Question

Which sentence correctly forms the plural of 1900?

A.
Was the helicopter invented in the 1900s'?

B.
Was the helicopter invented in the 1900's?

C.
Was the helicopter invented in the 1900s?

Answer 1

Was the helicopter invented in the 1900s

Step-by-step explanation:

Answer 2

C is the answer. Its kinda confusing, but C should be the answer. :)